Telecommunication Switching & Traffic
Telecommunication switching : Message switching, Circuit switching, Manual system,
Electronic switching. Digital switching : Switching functions, Telecommunication traffic
: Unit of traffic, Traffic measurement, A mathematical model, Lost- call systems :
Theory, Traffic performance, Loss systems in tandem, Traffic tables. Queuing systems :
Erlang distribution, Probability of delay, Finite queue capacity, Systems with a single
server, Queues in tandem, Delay tables and application of delay formulae.
Switching Networks and Signaling
Single stage networks, Gradings, Link systems, Grades of service of link systems. Time
division switching : Space and time switching, Time division switching networks,
Synchronization, Call processing functions, Common control, Reliability, Availability
and security. Signaling : Customer line signaling. FDM carrier systems, PCM signaling,
Inter-register signaling, Common channel signaling principles, CCITT signaling No. 6,
CCITT signaling No. 7, Digital customer line signaling.
Evolution of wireless systems, Introduction to cellular telephone system, Frequency
reuse, Channel assignment, Handoff strategies, Cell splitting, Propagation mechanism :
Free space loss, Reflection, Diffraction, Scattering. Fading and multipath : Small scale
multipath propagation, Impulse response model of multipath channel. Multiple access
techniques-TDMA, FDMA, CDMA.
First and Second Generation Mobile Systems
First generation cellular systems, AMPS, GSM cellular telephony : Introduction, Basic
GSM architecture, Basic radio transmission parameters in GSM system, Logical
channels, GSM time hierarchy, GSM burst structure, Description of call setup
procedure, Handover, Modifications and derivatives of GSM.
GSM physical layer : Speech coding and decoding, GMSK modulation, Data
CDMA Based Mobile Systems
Motivation for CDMA use, Spreading sequences, Basic transmitter and receiver
schemes, Rake receiver, IS-95 system : Frequency range, Downlink transmission, Uplink
transmission, Power control, Introduction to 3G mobile systems : W-CDMA and